Ftjrnace-wall construction



Sept. 7 1926. I 1,599,010

R. T. HASLAM FURNACE WALL CONSTRUCTION Filed August 16, 1923 5?) M WW(Tub Patented Sept. 1926.

. UNITED STATES ROBERT 'r. menus, or nnnmonnunssacirusn'rrs, ASSIGNOR.ro STANDARD DE- VELOPMENT COMPANY, A CORPORATION OF DELAWARE.

" FURNACE-WALL CONSTRUCTION.

Application filed August 16, 1923. Serial No. 657,827.

This invention relates to heating systems,

and will be fully understoodfrom the following description, taken inconnection with the accompanying drawingyin wh1ch Fig. 1 is a verticallongitudinal section of a furnace and heating chamber embodyingconstruction in accordance with the p'rlnciples of the invention;

Fig. 2is a sectional view, showing a detail of another form ofconstruction contemplated; and

Fig. 3 is a section of another embod1-' ment of the in'y'ention. f

As is well kn" wn, the-efficiency of heat take-up in furnaces in generalis undesirably low and the limitations have been considered as quiteeffectual. I

. In accordance with-thepresent invention, I am enabled tosecureiinci'eased utilization of the heat available," 'and withrelatively inexpensive construction in the refractories in theheatingchamber, while also bringing to advantageous use the factor ofradiation transfer.

Referring more particularly to Fig. 1 of the drawing, the referencecharacter]. designates a fire-box or furnace, and mounted in anysuitable manner are shown tubes '2 to be heated. Such tubes may be thoseof water-tube boilers, oil heaters, etc. At intervals along the chamberspace are projectiens 3 extending iromthe walls so as to resent aconsiderable exa geration or redundancy of exposure, an? additional-virtual extensions of radiat ng surface are effected by brick 4 or thelike; these being in loose or open placement-to. allow free passage ofthe hot products of Icombustion and at the same time being located inradiating relation to the tubes .2 or objects to be heated. Suchexposures present a correspondingly increased meansfor taking up heatfrom gases beyond the zone wherein substantial combustion takes placeand correspondingly function also to radiate it in turn to the tubes orobjects in sight which or other objects to the in the old practice.

of the hot gases and in radiating relation with respect to the tubes 11are heat-receiving and radiating exposures 12, connected with the'wallorindpendentthereof if preferred, except as to necessary support, anplaced in loose or openformation so as to allow free passage of the hotgases.

In the form.shown in Fi 3 the object to be heated is another cham er;the chamber 20 for illustration being the heating side and the chamber21 the side to be heated.

Examples of instances of such character are muflie furnaces, heatingfines for gases and chemical products, flues for recuperative recoveryof Waste heat from 'hot waste gases for preheating air for furnaces,etc. The projections 22 exposed to the hot gases take up heat andfunction in turn to radiate heat to the partition wall 23 which conductsthe heat to thefcooler gas in chamber 21. Additionally the wall 23radiates heat to the exposures 24, and these in turn give up heat byconductionto the cooler gas in contact. While most convenient as amatter of support, the elements 22 and-24 need not necessarily beattached to the walls.

The materials employed in'construction of radiating elements accordingto the present invention may comprise the usual refractories. By reasonof the increased efliciency resultant from this invention, however,relativel expensive materials, carborundum, urable alloys of iron, etc.,can be used for conductingi partitions, or the-like, where suchmaterials would not have been justified In the constructionsillustrated, it will be seen-that heat is taken up by theexposedelements provided and these in turn as heat conversion transferelements transfer the heat tothe objects to be heated.

While I have described my invention by reference to certain details, itwill be understood that this is for the purpose of illustration to makethe invention clear, and is not limitative, and the invention is to beconsidered as limited onl as defined in the following claims, in whic itis my intention to claim all inherent novelty as broadly as the priorart permits.

What I claim --is: p

1.- In combination, a combustion zone, a

heating chamber arranged to receive hot exposures positioned in saidchamber in upon said object.

2. In combination, a fire box, a heating chamber into which hot gasesfrom said fire box pass, refractory, redundant exposures in said chamberand positioned beyond the zone in which substantial combustion takesplace, anda tubular body to, be heated arranged adjacent said redundantexposures, whereby such exposures take up heat from said hot gases andradiate the same upon the tubular body.

3. In combination, a fire box, a heating chamber into which hot gasesfrom said fire box pass, refractory, redundant exposures projectinginwardly from the walls of the heating chamber beyond the zone in whichsubstantial combustion takes place, and a plurality of tubes to beheated arranged in the heating chamber and adjacent said redundantexposures, whereby such exposures take up heat from the hot gases andradiate the same upon the tubes.

ROBERT T. HASLAM.

